Secretion of which hormone is stimulated by strong acid in stomach and intestine?

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which hormone is stimulated by strong acid in the stomach and intestine. We need to identify the specific hormone that responds to the presence of strong acid (HCl).

2. **Identifying the Source of Acid**: The strong acid in question is hydrochloric acid (HCl), which is secreted in the stomach during digestion. When food enters the stomach, HCl is released to aid in breaking down food and creating an acidic environment.

3. **Movement of Acid**: Once the food mixed with HCl is processed in the stomach, it moves into the duodenum, which is the first part of the small intestine. The presence of HCl in the duodenum is crucial for further digestion.

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